Bug 59958: Add simple test-case

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1763487 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFEvaluationSheet.java

@@ -87,7 +87,7 @@ final class XSSFEvaluationSheet implements EvaluationSheet {
             evalcell = new XSSFEvaluationCell(cell, this);
             _cellCache.put(key, evalcell);
         }
-        
+
         return evalcell;
     }
     

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFEvaluationSheet.java

@@ -0,0 +1,55 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+package org.apache.poi.xssf.usermodel;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class TestXSSFEvaluationSheet {
+
+    @Test
+    public void test() throws Exception {
+        XSSFWorkbook wb = new XSSFWorkbook();
+        XSSFSheet sheet = wb.createSheet("test");
+        XSSFRow row = sheet.createRow(0);
+        row.createCell(0);
+        XSSFEvaluationSheet evalsheet = new XSSFEvaluationSheet(sheet);
+
+        assertNotNull("Cell 0,0 is found", evalsheet.getCell(0, 0));
+        assertNull("Cell 0,1 is not found", evalsheet.getCell(0, 1));
+        assertNull("Cell 1,0 is not found", evalsheet.getCell(1, 0));
+
+        // now add Cell 0,1
+        row.createCell(1);
+
+        assertNotNull("Cell 0,0 is found", evalsheet.getCell(0, 0));
+        assertNotNull("Cell 0,1 is now also found", evalsheet.getCell(0, 1));
+        assertNull("Cell 1,0 is not found", evalsheet.getCell(1, 0));
+
+        // after clearing all values it also works
+        row.createCell(2);
+        evalsheet.clearAllCachedResultValues();
+
+        assertNotNull("Cell 0,0 is found", evalsheet.getCell(0, 0));
+        assertNotNull("Cell 0,2 is now also found", evalsheet.getCell(0, 2));
+        assertNull("Cell 1,0 is not found", evalsheet.getCell(1, 0));
+
+        // other things
+        assertEquals(sheet, evalsheet.getXSSFSheet());
+    }
+}